6988981064 has 16 divisors (see below), whose sum is σ = 14112365820. Its totient is φ = 3225683520.

The previous prime is 6988981057. The next prime is 6988981067. The reversal of 6988981064 is 4601898896.

It can be written as a sum of positive squares in 2 ways, for example, as 6927232900 + 61748164 = 83230^2 + 7858^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6988980994 and 6988981012.

It is not an unprimeable number, because it can be changed into a prime (6988981067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33600767 + ... + 33600974.

Almost surely, 2^6988981064 is an apocalyptic number.

It is an amenable number.

6988981064 is an abundant number, since it is smaller than the sum of its proper divisors (7123384756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6988981064 is a wasteful number, since it uses less digits than its factorization.

6988981064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67201760 (or 67201756 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 59.

The square root of 6988981064 is about 83600.1259807663. The cubic root of 6988981064 is about 1911.9269191502.

The spelling of 6988981064 in words is "six billion, nine hundred eighty-eight million, nine hundred eighty-one thousand, sixty-four".